1999

4.3

2007

3.2

1989

5.6

1997

5.2

2003

5.9

1966

4.5

1974

4.9

1985

5.2

1977

5.2

1997

4.4

1999

4.2

1969

5.0

1970

4.0

1967

0.0

1990

5.8

2002

5.8